2699691639680 has 64 divisors (see below), whose sum is σ = 7375943242080. Its totient is φ = 925608560640.

The previous prime is 2699691639661. The next prime is 2699691639683. The reversal of 2699691639680 is 869361969962.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 2699691639598 and 2699691639607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2699691639683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301300391 + ... + 301309350.

Almost surely, 2^{2699691639680} is an apocalyptic number.

2699691639680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2699691639680 is an abundant number, since it is smaller than the sum of its proper divisors (4676251602400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2699691639680 is an equidigital number, since it uses as much as digits as its factorization.

2699691639680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602609767 (or 602609755 counting only the distinct ones).

The product of its (nonzero) digits is 408146688, while the sum is 74.

The spelling of 2699691639680 in words is "two trillion, six hundred ninety-nine billion, six hundred ninety-one million, six hundred thirty-nine thousand, six hundred eighty".